Apparatus for making paper cups with rolled edges.



G. 1. BOHLMAN.

APPARATUS FOR MAKING PAPER CUPS WIT'H ROLLED EDGES.

APPLICATION FILED NOV-2| l9!4 I 2 SHEETS-SHEET I.

Patented Oct.

G. J. BOHLMAN.

APPARATUS FOR MAKING PAPER CUPS WITH ROLLED EDGES. APPLICATION FILED NOV. 2, 1914.

1,155,77. Patented Oct. 5, 1915.

GEORGE J'. IBOHLMAN, F MEDFORD, MASSACHUSETTS, ASSIGNOR TO AMERICAN WATER SUPPLY COMPANY OF NEW ENGLAND, 0F BOSTON, MASSACHUSETTS, A GORPORA:

TION OF MAINE.

APPARATUS roe MAKING PAPER curs wrm ROLLED linens.

- To all whom it may concern:

Be it known that I, GEORGE J. BOHLMAN,

a citizen of the United States, residing at Medford, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Apparatus for Making Pa per Cups With Rolled Edges, of which the following is a specification.

This invention relates to an apparatus for rolling the edges of paper cup-bodies and other receptacles by which a roll of small diameter and preferably of circular form may be produced. A paper cup of th1s description having a rolled edge produced by shown, forms the subject matter of my application for Letters Patent #869,762, filed Nov. 2, 1914.

The'invention has for its object the construction of a bending-device by which the edge of the cup-body is heated and bent to form a roll. said device having supporting. means for the cup-body associated with 1t,

' and means to rotate the device at a speed to' this invention by which the end-portion of a paper cup-body may be bent to form a roll. Fig. 2 is a horizontal sectional view of the same on the line 2-2, Fig. 1. Fig. 3 is of a modified form of device embodying my invention. Fig.- 4 is a plan view of the device shown in Fig. 3. Fig. 5 is an enlarged detail of a portion of the device, illustrating the formation of the roll.

10 represents a form of frusto-conical or other shape which serves as the means to support the cup-body while its end-portion is being bent to form a roll. Said form is of a shape corresponding to the shape of the cup-body, but is of lesser dimensions than the interior of the cup-body except at the base, so that said body will loosely fit the form, yet said form will serve to steady the Specification of Letters Patent.

the method involved in the apparatus here vertical section of an apparatus embodying a side elevation and partial vertical section cup-body sufliciently to'serve as a supportassist in directing it while applying pressure to it in a downward direction. At the lower end or base of the form 10, a plurality of rolls 12 are arranged, which are separately supported and free to revolve on studs 13, which project radially from the form and in a direction at right angles to the inclined faces thereof or thereabout, and saidrollers are equidistantly spaced apart and arranged in recesses in a flange on the form. These rollers each have a peripheral groove '14, the faces of which are curved, and the inner of said grooves are arranged in continuation of the inclined face of the form or thereabout, so that when the cup-body is placed Patented Oct. 5, 1915. Application filed November 2, 1914. Serial No. 869,764.

ing-means therefor and also as a guide to on the form, its lower end-portion will enter the grooves in the rollersi "engaging' said inner sides thereof preparatory to being bent outwardly by following the curved faces of the grooves. As here shown, the

rollers are arranged in two sets, one set be- 7 ing arranged at aslightly lower elevation than those of the other set, so that those which are arranged at the higher elevation will be first engaged by the :end of the cupbody. By arranging the rollers in this manner the bending operation is much better performed. The form 10 bearing the rollers is surmounted on top of a vertical spindle 15, having suitable bearings, and a beltpulley 16 is secured to said spindle over which a belt passes for rotating the form.

In lieu thereof other means may be provided for rotating the spindle and form carried by, it. The form may be rotated at a high rate of speed, so that the end-portion of the cup-body will become heated more or less which facilitates the bending of the paper,

particularly when a slight stretching of the by hand, is pressed downward, and during such downward movement its end-portion is by following the curved bent outwardly faces of the grooves in the rollers, and such 7 downward movement may be continued un-' til a complete circular roll has been formed on said end-portion, althoughitwill be unlid may be suflicientl The grooves in the rolls have wide open mouths, so that the rolled edge on the cup-body may be withdrawn without obstruction.

Referring to Figs. 3 and 4, wherein a modified'form of device is-shown, the form is substantially the same as the form heretofore described, but in lieu of providing a plurality of grooved rollers at the base of the form, a flange is provided at the base of the form-having a groove 21 in its upper side, the wall of said groove being arranged in continuation of the inclined face ,or wall of the form, so that the inner diameter-of the groove 21. will be approximately the same as the diameter of the end-portion of the cup-body. Said form 10 is surmounted on top of the vertical spindle 22, having suitable bearings, and a belt-pulley 23 is secured to said spindle over which a belt passes for rotating the device rapidly. The paper cupbody is placed on the form with its lower edge engaging the flange, and'entering the groove 21 thereof, and then a slight pressure is applied to said cup-body in a downward direction, as for instance,-the pressure of the hand will be sufiicient, by which its loweredge is caused to frictionally engage said flange, and by the friction, due to the rapid rotation, said edge-portion will be heated to a high temperature, and while heated to a high temperature and said pressure is continued, its edge-portion is caused to follow the curved wall of the groove 21,

thus bending outwardly, upwardly, and inwardly, and forming a roll, which, it will be seen, will be circular. The xten of downward movement will determine whether or not the roll, which is formed, will be a complete circle, and it is obvious that it may be moved downward more or less, as desired.

The form shown in Fig. 3 is better adapted for heating the paper in case heating is desired, on account of the increased friction. produced,as compared with the form shown in Fig. 1.

I claim 3 1.' An ap aratus'for rolling the edges of paper cupodies, consisting of a form arranged to receive upon it and guide the cupbody, enabling said body to be grasped and.

held against rotation, and a plurality of grooved rollers arranged radially on said form at the base thereof, the grooves of which are arranged to receive the end-portion of the cup-body, and to deflect the same,

and means to rotate said form and thereby revolve said rollers about the axis of the form, said rollers being'free to rotate about their own axes, substantially as described.

2. An apparatus for rolling the edges of paper cup-bodies, consisting of a form arranged to receive upon it the cup body and mama? .having an outwardly extended flange at its lowet 'end with spaced apart recesses, and

rotate said form, substantially as described. 3. An apparatus for rolling the edgs of paper cup-bodies, consisting of. a form arranged to support and guide the cup-body, and a plurality of grooved rollers arranged radially on said form at the base thereof, the grooves of which are arranged to receive the end-portion of the cup-body and to de-' fiect the same, some of said. rollers being arranged at a lower elevation than the others, and means to rotate said form, and thereby revolve said rollers about the axis of the form, said rollers being freely rotatable about their own axis, substantially as described. I

4. vAn apparatus for rolling the edges of paper cup-bodies, consisting of a form and a grooved-element associated with it, the groove of which is adapted to receive the end-portion of the cup-body, and means to rapidly revolve said grooved-element, to deflect the end-portion of said body while said body is held firmly in engagement with it and against rotation and is being pressed downward, one wall of said groove being arranged in continuation of the wall of the form, substantially as described.

5. An apparatus for rolling the edges of paper cup-bodies, consisting of a form an agrooved-element associated with it, the groove of which is adapted to receive the end-portion of the cup-body, and means to rapidly revolve said grooved-element to de- F fleet the end-portion of said body whilesaid tinuation of the wall of the form, substan:

tially as described. 6. An apparatus for rolling the edges of cup-bodies, consisting of a form and a body and to deflect the same, and means to grooved-element associated with it, the

groove of hich is adapted to receive the end-portion of the cup-body, and means to rapidly revolve said form and grooved-ele- I ment, thereby to deflect theend-portion of said body while-said body is held firmly in engagement with. it, and against rotation, and is being pressed-downward, the diameter of one wall of the groove of said element corresponding with the diameter of the endportion'of the cup-body, substantially as described;

7. An apparatus for rolling the edges of cup-bodies, consisting of av form and a grooved-element associated with it, the groove of which is adapted to receive the end-ortion ofcthe cup-body, and means to rapi y revolve said form and grooved-element thereby to deflect the end-portion of In testimony whereof, I have signed my .said body, while said body is held firmly in name to this specification, in the presence of 1o engagement with it, and against (ii'otation, two subscribing witnesses. and is being'pressed'downwar the iameter of the inner wall of the groove of said ele- GEORGE BOHLMAN' ment corresponding with the diameter of the Witnesses: end-portion of the cup-body, substantially ELIZABETH M. HANSON,

as described; v Amos TAILOR. 

